/*
// Copyright (c) 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
/*
 *
 * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the Contiki operating system.
 */

#ifndef CONSTANTS_H
#define CONSTANTS_H

#ifdef __cplusplus
extern "C" {
#endif

#define COAP_DEFAULT_PORT 5683

#define COAP_DEFAULT_MAX_AGE 60

#define COAP_RESPONSE_TIMEOUT (5)
#define COAP_RESPONSE_RANDOM_FACTOR (1.5)
#define COAP_MAX_RETRANSMIT (4)

/** COAP_RESPONSE_TIMEOUT * ((2 ** COAP_MAX_RETRANSMIT) - 1) *
 * COAP_RESPONSE_RANDOM_FACTOR */
#define OC_MAX_TRANSMIT_SPAN (113)

#define OC_MAX_LATENCY (100)
#define OC_PROCESSING_DELAY COAP_RESPONSE_TIMEOUT
#define OC_MAX_RTT ((2 * OC_MAX_LATENCY) + OC_PROCESSING_DELAY)

/** OC_MAX_TRANSMIT_SPAN + OC_MAX_LATENCY */
#define OC_NON_LIFETIME (OC_MAX_TRANSMIT_SPAN + OC_MAX_LATENCY)

/** OC_MAX_TRANSMIT_SPAN + (2 * MAX_LATENCY) + PROCESSING_DELAY */
#define OC_EXCHANGE_LIFETIME (318)

#define COAP_HEADER_LEN                                                        \
  4 /* | version:0x03 type:0x0C tkl:0xF0 | code | mid:0x00FF | mid:0xFF00 | */
#define COAP_TOKEN_LEN 8 /**< The maximum number of bytes for the Token */
#define COAP_ETAG_LEN 8  /**< The maximum number of bytes for the ETag */
#define COAP_ECHO_LEN 40 /**< The maximum size of the Echo option */

#define COAP_HEADER_VERSION_MASK 0xC0
#define COAP_HEADER_VERSION_POSITION 6
#define COAP_HEADER_TYPE_MASK 0x30
#define COAP_HEADER_TYPE_POSITION 4
#define COAP_HEADER_TOKEN_LEN_MASK 0x0F
#define COAP_HEADER_TOKEN_LEN_POSITION 0

#define COAP_HEADER_OPTION_DELTA_MASK 0xF0
#define COAP_HEADER_OPTION_SHORT_LENGTH_MASK 0x0F

#define COAP_TCP_DEFAULT_HEADER_LEN                                            \
  2 /* | len:0xF0 tkl:0x0F | .... | code |                                     \
     */
#define COAP_TCP_MAX_EXTENDED_LENGTH_LEN 4
#define COAP_PAYLOAD_MARKER_LEN 1 /* 0xFF */

#define COAP_TCP_HEADER_LEN_MASK 0xF0
#define COAP_TCP_HEADER_LEN_POSITION 4

#define COAP_TCP_EXTENDED_LENGTH_1 13
#define COAP_TCP_EXTENDED_LENGTH_1_DEFAULT_LEN 13

#define COAP_TCP_EXTENDED_LENGTH_2 14
#define COAP_TCP_EXTENDED_LENGTH_2_DEFAULT_LEN 269

#define COAP_TCP_EXTENDED_LENGTH_3 15
#define COAP_TCP_EXTENDED_LENGTH_3_DEFAULT_LEN 65805

/** CoAP message types */
typedef enum {
  COAP_TYPE_CON, /* confirmables */
  COAP_TYPE_NON, /* non-confirmables */
  COAP_TYPE_ACK, /* acknowledgements */
  COAP_TYPE_RST  /* reset */
} coap_message_type_t;

/** CoAP request method codes */
typedef enum { COAP_GET = 1, COAP_POST, COAP_PUT, COAP_DELETE } coap_method_t;

/** CoAP response codes */
typedef enum {
  COAP_NO_ERROR = 0,

  CREATED_2_01 = 65,  /* CREATED */
  DELETED_2_02 = 66,  /* DELETED */
  VALID_2_03 = 67,    /* NOT_MODIFIED */
  CHANGED_2_04 = 68,  /* CHANGED */
  CONTENT_2_05 = 69,  /* OK */
  CONTINUE_2_31 = 95, /* CONTINUE */

  BAD_REQUEST_4_00 = 128,              /* BAD_REQUEST */
  UNAUTHORIZED_4_01 = 129,             /* UNAUTHORIZED */
  BAD_OPTION_4_02 = 130,               /* BAD_OPTION */
  FORBIDDEN_4_03 = 131,                /* FORBIDDEN */
  NOT_FOUND_4_04 = 132,                /* NOT_FOUND */
  METHOD_NOT_ALLOWED_4_05 = 133,       /* METHOD_NOT_ALLOWED */
  NOT_ACCEPTABLE_4_06 = 134,           /* NOT_ACCEPTABLE */
  PRECONDITION_FAILED_4_12 = 140,      /* BAD_REQUEST */
  REQUEST_ENTITY_TOO_LARGE_4_13 = 141, /* REQUEST_ENTITY_TOO_LARGE */
  UNSUPPORTED_MEDIA_TYPE_4_15 = 143,   /* UNSUPPORTED_MEDIA_TYPE */

  INTERNAL_SERVER_ERROR_5_00 = 160,  /* INTERNAL_SERVER_ERROR */
  NOT_IMPLEMENTED_5_01 = 161,        /* NOT_IMPLEMENTED */
  BAD_GATEWAY_5_02 = 162,            /* BAD_GATEWAY */
  SERVICE_UNAVAILABLE_5_03 = 163,    /* SERVICE_UNAVAILABLE */
  GATEWAY_TIMEOUT_5_04 = 164,        /* GATEWAY_TIMEOUT */
  PROXYING_NOT_SUPPORTED_5_05 = 165, /* PROXYING_NOT_SUPPORTED */

  /* Stack errors */
  MEMORY_ALLOCATION_ERROR = 192,
  PACKET_SERIALIZATION_ERROR,
  CLEAR_TRANSACTION,
  EMPTY_ACK_RESPONSE,
  CLOSE_ALL_TLS_SESSIONS
} coap_status_t;

/** CoAP header option numbers */
typedef enum {
  COAP_OPTION_IF_MATCH = 1,                    /* 0-8 B */
  COAP_OPTION_URI_HOST = 3,                    /* 1-255 B */
  COAP_OPTION_ETAG = 4,                        /* 1-8 B */
  COAP_OPTION_IF_NONE_MATCH = 5,               /* 0 B */
  COAP_OPTION_OBSERVE = 6,                     /* 0-3 B */
  COAP_OPTION_URI_PORT = 7,                    /* 0-2 B */
  COAP_OPTION_LOCATION_PATH = 8,               /* 0-255 B */
  COAP_OPTION_OSCORE = 9,                      /* 0-255 B */
  COAP_OPTION_URI_PATH = 11,                   /* 0-255 B */
  COAP_OPTION_CONTENT_FORMAT = 12,             /* 0-2 B */
  COAP_OPTION_MAX_AGE = 14,                    /* 0-4 B */
  COAP_OPTION_URI_QUERY = 15,                  /* 0-255 B */
  COAP_OPTION_ACCEPT = 17,                     /* 0-2 B */
  COAP_OPTION_LOCATION_QUERY = 20,             /* 0-255 B */
  COAP_OPTION_BLOCK2 = 23,                     /* 1-3 B */
  COAP_OPTION_BLOCK1 = 27,                     /* 1-3 B */
  COAP_OPTION_SIZE2 = 28,                      /* 0-4 B */
  COAP_OPTION_PROXY_URI = 35,                  /* 1-1034 B */
  COAP_OPTION_PROXY_SCHEME = 39,               /* 1-255 B */
  COAP_OPTION_SIZE1 = 60,                      /* 0-4 B */
  COAP_OPTION_ECHO = 252,                      /* 1-40 */
  OCF_OPTION_ACCEPT_CONTENT_FORMAT_VER = 2049, /* 2 B */
  OCF_OPTION_CONTENT_FORMAT_VER = 2053         /* 2 B */
} coap_option_t;

#ifdef __cplusplus
}
#endif

#endif /* CONSTANTS_H */
